Sand-drier.



PATENTED OCT. 30. *1906! G.v L. WEBB. SAND DRI-ER. APPLICATION FILED AUG. ql?, 1906.

eeeees W1 TNESSES [Nl/ENTO/e A TTORNE 'YS UNITED STATES PATENT OEEICE.

` GEORGE il. WEBB, OE SPENCER, .NORTH CAROLINA.

y ySAND-Danila.

Patented Oct. 30, 1906. p

Application filed August 17,1906. Serial No. 331,089.

To all whom, it may concern:

Be it known that I, GEORGE L. WEBB, a cltlzen of the United States, residing at Spencer, in the county of Rowan and State of North Carolina, have invented a new and useful Sand-Drier, of which the following is `a specification.

This invention relates to apparatus for drying sand, gravel, &c. and its object is to provide a paratus of this character which will quick y and thoroughly dry large quantities of material.

A still further object is to provide a drier havng novel means for discharging the dry san Another obj ect is to provide means whereby large stones or other material which may interfere with the vdischarge of the sand or gravel can be readily removed by the operator.

With the above and other objects in view the invention consists of a casing having interior walls formed of wire-netting, while the bottomthereof consists of a series of gratebars mounted to rock simultaneously, so as to agitate the contents o f the casing and cause the discharge thereof. Parallel vertical coils ofppipes are disposed within the casing and connected to a suitable steam-supply, and each coil is provided with a vent to permit the steam to exhaust from the coils. Means are provided whereby access maybe conveniently had to the upper faces of the grate-bars for thevpurpose o permitting the removal of any undesirable accumulations thereon.

The invention also consists in providing novel means for facilitating the escape of vapor from th'e heated body of material.

he invention also consists of certain novel features ofyconstruction and combinations of parts, which` will be hereinafter more fully described, and pointed out in the claims.

In the accompanying drawings is shown the preferred form of the invention.

In said drawings, Figure 1 is a view of the a paratus, showin the same partly in side e evation and part y in section. Fig. 2 is a vertical transverse section, and Fig. 3 is a horizontal section through one corner of the apparatus and showing one end of a gratebar in plan.

Referring to the figures by characters of reference, 1 1 are vertical standards secured to sills or base-strips 2 and arranged inparal-V the standards of. `each side being.

lel rows,

l brackets 20, this movement connectedv by inverted- L-shaped side strips 3, having substantially semicircular recesses 4 in their upper faces at desired intervals.

Outer walls 5 are secured upon the outer 6o faces of the standards l and connect the end standards, so as to form a rectangular casing. An inner wall 6, formed of a screen of line mesh, is secured upon the inner faces of the end standards 1, and angle-irons 7 are 65 of and bearing within the notches or recesses 4, hereinbefore referred to. As shown particularly in Figs. 1 and 3, each grate-bar is formed with a number of apertures 13, and each grate-bar has an arm 14 extending downward therefrom. All of these arms are iv- 8o otally connected to a rod'l5, one en of which is pivoted, as at 16, to a lever 17,

journaled within a bracket 18, extending from one end of the casing. The grate-bars are so proportioned that when in their normal or horizontal positions their adjoining edges lie close together, so that a substantially continuous casing-bottom is produced. All of the screens 6 and 10 extend downward to the lower edges of the outer walls of 9o the casing. One of the side walls 5, however, terminates at a point above and Somewhat removed from the plane occupied by the upper faces of thev grate-bars, and the spacebelow this wall is adapted to be closed by a removable closure 19, which is supported within brackets 20, secured to the standards 1, and is ada ted to fit under and lie flush with the walf)5 thereabove. In order that the closure 19 may be easily removed, roo

threaded studs 21 extend from the lower edge of said wall 5, and the closure 19. is formed with slots 22 directly below these studs. Nuts 23 are adapted to be screwed upon the studs so as to overlap the closure 19 and hold it securely in position. When, however, it is desired to remove the closure, the nuts are unscrewed from the studs and the closure is then swung so as to escape the lower edge of the wall 5.

then be pushed upward, so as to escape the being permitted walls and aref7o Said closure can 1ro in view of the provision of the slots 22, which receive the threaded lugs during this upward movement of the closure.

Secured upon the corner-standards of the casing and in contact with the inner faces of the end walls of said casing are hookelike brackets 24, which constitute seats for supporting-strips 25, extending longitudinally of the casing above the grate-bars and adj acent to the side screens. These bars 25 are provided at desired intervals with recesses 26, extending into the upper faces thereof. These recesses constitute seats for the lower pipes of vertical coils 27, preferably disposed in parallel planes, as shown particularly in Fig. 2. The lower pipes of these coils are all connected to the steam-supply pipe 28, which extends transversely within the casing adjacent one end, and the upper pipes of the coils are preferably connected at one end by a cross-pipe 29, by the provision of which steamepressure within all of the coils is sure to be equalized. Each coil projects at its upper' end from one end of the casing, as shown at A30, and has a screw-cap 31 thereon provided with a small vent 32, which permits the escape of the steam.

It is of course understood that any desired number of coils 27 may be used within the casing, and one or more of these coils has a series of vent-tubes 33 secured to it. These tubes are open at both ends and extend above the casing, while the lower ends are supported at suitable distances above the grate-bars. The tubes are preferably held in place by yokes 34, which embrace them, and have their threaded ends secured within plates 35, said plates and tube bearing upon .opposite portions of the coil. This construction and arrangement ofparts are clearly illustrated in Fig. 2. Each of the tubes 33 has a plurality of apertures 36 formed therein, said apertures constituting the outlets for the moisture driven from the material within the casing. It might be stated that any den sired means may be employed for maintaining the coils in upright positions. For this purpose I preferably utilize cross-strips 37, which are secured to the corner-standards of the casing and have recesses 38 in their lower faces in which the upper pipes of the coils are seated. The side walls of the casing are preferably inclined outward, as shown at 39, so that the upper portion of the casing is in the form of a hopper into which material can be conveniently discharged.

When it is desired to heat sand or gravel, the same is dumped into the bottom of the casing and will be supported by the gratebars and will surround the heating-coils and the vent-tubes. When steam is directed into the coils, it will of course circulate through them and thoroughly heat the material con* tacting therewith. The moisture contained within said material will be driven outward through the screens 6 and 10, upward through the top of the casing, and inward through the openings 36 and into the tubes Obviously with these numerous provisions for the escape of moisture the contents of the casing can be very quickly dried. Moreover, said casing can be constructed to hold a very large amount of sand or gravel, it merely being necessary to provide enough coils and vent-tubes to meet the requirements. As the sand or gravel dries it will fall through the apertures in the grate-bars, and this discharge may be accelerated by actuating the lever 17 so as to slightly rock the bars. By swinging the bars to the limit of their movement the contents of the casing will be quickly discharged therebetween. Should large stones or other material accumulate on the grate-bars and interfere with the discharge of the sand, &c., the closure 19 can be removed in the manner hereinbefore stated, and by inserting a rod or scraper'above the bars the undesirable accumulations can be easily removed.

The preferred form of the invention has been set forth in the foregoing description; but I do not limit myself thereto, as I am aware that modifications may be made therein without departing from the spirit or sacrificing the advantages thereof. For instance, the end wall adjacent the headers 38 and 29 can be made removable, so as to permit access to be readily had thereto, so as to permit repairs to be easily made. I also reserve the right to make such other changes as may fairly fall within the scope of the claims.

What is claimed is- 1. In a drier of the character described the combination with a casing having screens therein constituting inner walls; of heatingpipes exposed within the casing, and apertured vent-tubes supported between said pipes.

2. In a drier the combination with a casing having inner walls constituting screens; of heating-coils disposed within the casing, and apertured vent-tubes secured to and supported above the bottom of the casing by the coils, said tubes having open ends.

3. In a drier the eombnation with a cas ing having inner walls constituting screens; of recessed strips detachably mounted within. the casing, vertical heating-coils seated within said recesses, and apertured vent-tubes secured to and supported above the bottom of the casing by said coils.

IOO

lIO

4. In a drier the combination with a casing havingl inner walls formed of fabric; of brackets within the casing, recessed supporting-strips detachably mounted within the brackets, vertical heating-coils seated within the recesses, and recessed holding-strips secured within the casing and engaging the upper portions of said coils.

5.4 In a drier the combination with a casing having inner Walls formed of fabric; of brackets Within the casing, recessed supporting-strips detachably mounted Within the brackets, vertical heating-coils seated Within the recesses, recessed holding-strips secured Within the casing and engaging the upper portions of said coils, and apertured ventl tubes secured to, and supported above the bottom of the casing b the coils, said tubes being open at their en s.

In a drier the combination with a casing having inner Walls of metal fabric, and heating-coils Within the casing; of grate-bars pivotall mounted Within the casing, means for simu taneously rocking the bars, and a detachable closure extending vacross the ends of said bars.

for simultaneously rocking the bars, 'bracki ets, a closure detachably supported by said brackets and extending-over one end of the bars, and means for securing xthe closure against displacement.

In testimony that I claim the foregoing as my own I have hereto afliXed my signature in the presence of tWo Witnesses.

i GEO. L. WEBB. Witnesses:

W. D. PETHEL, A. J. GEMAYEL. 

